Abstract
In order to promote the application of constructed wetland technology for wastewater treatment and for preventing the Lake Dianchi Valley of China from further eutrophication, field studies was carried out, which included the small-scale, pilot-scale experiments, and finally demonstration treatment systems. In this study, the performance of a combined free water, subsurface constructed wetlands and ecological pond system was designed and adopted to treat one village's sewage. The monitor results of 430 days showed that the mean removal rates of total nitrogen, ammonia-nitrogen, total phosphorus and COD were 89.9%, 85.1%, 85.1% and 80.6%, respectively. The water quality could achieve the design requirement. The performance of wetland system in the storm was also investigated. The system could resist the impulse load of stormwater and had a good capacity to reduce the non-point source pollutants brought by the stormwater runoff.
